The One Abrahamic Family In the biblical tradition, Ishmael and Isaac are brothers, or to be more precise, half-brothers. The first was born from Hagar, and the second from Sarah (c.f. Gen 16 and 21). The Arabs claim physical descent from Abraham through Ishmael; the Jews claim physical descent from Abraham through Isaac; and the Christians claim spiritual descent from Abraham through faith in Jesus Christ. Thus, all three religious traditions claim connection to the ancient Patriarch, each in their own way. Hence, Jews, Christians, and Muslims are all kin; all belong to one family; are all sisters and brothers; are all daughters and sons of Abraham. Accordingly, we speak of the "Abrahamic r...